Looking for a manual for an early 1960s Bobcat 820 snowblower. The exact model number is 820-6602.

Perhaps one of these is close enough to be helpful? https://drive.google.com/drive/folde...0pQMjduN281Tm8

Yes, Thank you. Did not find everything I wanted, however one of them was a big help. It seems I have a 1961 820 with a 3 1/2 HP Lauson.

Now to hunt down a few missing parts, most notably a missing tire rim. Never saw that 2 piece rim system they used on anything, hopefully can replace with a modern welded steel full rim wheel and tire without too much aggravation.

Updates...
Finally picked up this oldie... S/N says built in 1961. Engine is a Lawson/Tecumseh HR36P-2403P. Could not find this exact motor, however found other motors of the same era and it seems as if the "R" in the HR stands for "Reduction" .
I found partial manual for the HR20 and it shows a 6:1 gear reduction on the output, making sourcing a new (alternative) engine problematic. When I say partial manual, the manual only shows the reduction gearbox as a part of the engine leading me to the conclusion that manuals for the H20 series engines would be the same manual for the same (albeit lower HP) engine sans gear reduction.